Ion cyclotron resonance excitatio/de-excitation: A basis for Stochastic fourier transform ion cyclotron mass spectrometry

✍ Scribed by Alan G. Marshall; Tao-Chin Lin Wang; Tom Lebatuan Ricca

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 296 KB
• Volume: 105
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(84)85657-2

✦ Synopsis

Previous masz spectrometers based on the ion cyclotron resonance principle have employed continuous excitation (smgle-pube or frequency-sweep), with detection during (frequency-sweep) or after (single-pulse or frequency smcep) the excitation. The present paper introduces an exper-knent in uhich an ion is fiist cuzired IO a lar_eer orbit by conrinuous excitatmn, and then "de-excited" back to irs starting point. The effect is demonstrated for Ihe C9FIoN* peak (m/z = 502) in the Fourier transform mn cyclotmn mass spectrum of perfluorotribu~ylamine. By choosing which ion m/z ratios are "de-exited",

it should be possible to generate mass 'tiindows" within which ions experience no ner excitation. Potential appliutions of the method include the gensration of an erciration with sharply defined "windows" OI "steps", \ith major advantages for MS/hlS or multiple-ion-monitoring experiments.